I've been where you are more times than I can count. It's ultimately up to you whether to give up or not but, I'll tell you what you can expect if you do give up.
You will either continue to get worse and feel worse or if you have any kind of meaness or hidden anger in you then, you will likely become pessimistic, cold and cruel. Nothing will matter save for that which you desire and the feelings and hardships of others will mean much less to you if at all.
That's where I am right now in a sense but, because my mind houses a few caring personalities I or we are still capable of showing genuine concern for others in need. On my own I seem to be okay but, I'm not. I'm just pretending to be okay. It's not a fun way to be. Believe me when I say that you don't want to come down this road.
As pointless as it seems and as painful as it is to give it another try, it is better than being down here, in the darkness.
"Good luck" if you believe in that sort of thing.